<?php 

$sid = $_GET['sid']; 
// 根据ID查询数据表，返回数据记录
require_once 'db_conn.php';  // $conn
$sql = "
SELECT * 
FROM  t_message 
WHERE  id =$sid
LIMIT 1
";
//echo $sql;
//die;
$result = $conn->query($sql);
$rows = $result->fetch_array(MYSQLI_ASSOC);
//echo "<pre>";
//print_r($rows);
//die;
$data = array();
$data['status'] = 1;
$data['info'] = $rows;
echo json_encode($data);